Removal and utilization of calcite existed in scheelite by preparation of calcium sulfate whiskers

Guan Qingjun; Sun Wei; Hu Yuehua; Guan Changping; Yin Zhigang; Zhang Chenhu

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Removal and utilization of calcite existed in scheelite by preparation of calcium sulfate whiskers

机译：硫酸钙晶须制备对白钨矿中方解石的去除与利用

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In order to eliminate the effect of calcite associated with scheelite on the scheelite flotation, hydrochloric acid was used to dissolve the calcite, and the soaking solution was used to prepare CaSO4 whiskers by hydrothermal reaction with sulfuric acid at ambient pressure. First, the condition experiments of preparing CaSO4 whiskers by using CaCl2 and H2SO4 were carried out to optimize reaction parameters of the crystallization process. The optimal conditions were: at 102 _C reaction temperature, 0.5 mol/L reactant concentration and 60 min reaction time. Then based on the condition experiments and considering keeping acid concentration stable for achieving HCl recycling, Calcium sulfate whiskers with the average diameter of 1.41 lm and the average aspect ratio of 109 were prepared by the soaking solution after evaporating to half of its volume and 1.0 mol/L H2SO4 at 102 _C for 60 min. After ion exchange processing, the filtrate could be used as HCl in the process of HCl dissolution.

机译：为了消除方解石和白钨矿对白钨矿浮选的影响，使用盐酸溶解方解石，并通过在常压下与硫酸进行水热反应，通过浸泡溶液制备CaSO4晶须。首先，进行了用CaCl2和H2SO4制备CaSO4晶须的条件实验，以优化结晶过程的反应参数。最佳条件为：反应温度为102℃，反应物浓度为0.5 mol / L，反应时间为60 min。然后根据条件实验并考虑保持酸浓度稳定以实现HCl循环利用，将溶液蒸发至其一半体积和1.0 mol后，通过浸泡溶液制备平均直径为1.41 lm和平均长径比为109的硫酸钙晶须/ L H2SO4在102℃下60分钟。经过离子交换处理后，滤液可在HCl溶解过程中用作HCl。

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来源
《矿业科学技术学报：英文版》 |2017年第006期|P.1005-1010|共6页
作者
Guan Qingjun; Sun Wei; Hu Yuehua; Guan Changping; Yin Zhigang; Zhang Chenhu;
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作者单位

[1]School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China;

[1]School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China;

[1]School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China;

[1]School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China;

[1]School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China;

[1]School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China;

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 CHI
中图分类矿业工程;
关键词
Calcium sulfate whiskers; Scheelite; Calcite; HCl; Hydrothermal reaction;

机译：硫酸钙晶须白钨矿方解石HCl水热反应;

Removal and utilization of calcite existed in scheelite by preparation of calcium sulfate whiskers

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